On Sep 19, 11:00 am, "Paul Scott"
wrote:
"Tom Anderson" wrote in message

h.li...

Morning all,

So, that line is two-track to Heathrow Central, where it singles down for
the bit to T4. This map i have also shows the extension to T5 as
single-track. Is that true? I have also read that the station box at T5 is
big enough for four tracks and four platforms; even with an eye to
building AirTrack in the future, that seems like overkill for a single
track line. Not to mention that AirTrack and a single-track stretch from
T5 to T123 won't mix well.

T5 has space for 6 tracks and 6 platforms, 2 for HEx, 2 for Picc, and 2 for
Airtrack but those for Airtrack will be partitioned off until required. I
believe the Piccadilly line to T5 will operate as separate arrival and
departure platforms, with a headshunt for trains, but HEx will operate to
either of its two platforms, with a crossover on the upside of the platforms

Paul

That is correct, Picc line trains will arrive at platform 5, detrain,
then reverse via one of the two sidings, re-entering service at
platform 6.
The platforms are connected via lifts and escalators, to some sort of
circulating area/lobby above the rail lines. The Heathrow Express
platforms also have those flash blue lights under the platform edge!
Each railway is partitioned off, but at the west end of the platforms,
they have changed it to glass.